[PATCH rdma-core 2/5] mlx5: Support dma-buf based memory region

[Xiong, Jianxin]

> -----Original Message-----
> From: Jason Gunthorpe <jgg at ziepe.ca>
> Sent: Monday, November 23, 2020 10:02 AM
> To: Xiong, Jianxin <jianxin.xiong at intel.com>
> Cc: linux-rdma at vger.kernel.org; dri-devel at lists.freedesktop.org; Doug Ledford <dledford at redhat.com>; Leon Romanovsky
> <leon at kernel.org>; Sumit Semwal <sumit.semwal at linaro.org>; Christian Koenig <christian.koenig at amd.com>; Vetter, Daniel
> <daniel.vetter at intel.com>
> Subject: Re: [PATCH rdma-core 2/5] mlx5: Support dma-buf based memory region
> 
> On Mon, Nov 23, 2020 at 09:53:01AM -0800, Jianxin Xiong wrote:
> 
> > +struct ibv_mr *mlx5_reg_dmabuf_mr(struct ibv_pd *pd, uint64_t offset, size_t length,
> > +				  uint64_t iova, int fd, int acc) {
> > +	struct mlx5_mr *mr;
> > +	int ret;
> > +	enum ibv_access_flags access = (enum ibv_access_flags)acc;
> 
> Why?

It's copied from mlx5_reg_mr(). Didn't pay attention to this but looks unnecessary now.

> 
> Jason